They all have something to do with how newborn babies are born, and how they are affected by environment and change. There is meiosis and mitosis which are characterized in the mix as well.
All three of the listed, have something to do with Child birth.
Remember that these are also steps of what happens before a child is born.
Take a White Flower and measure it with different soil temperatures and see if it changes colors. And don't forget to record the color and take a picture with different temperatures